'Box has already been closed' error right after openBox()

[kaboc]

Steps to Reproduce
Running the code below four times causes an error: HiveError: Box has already been closed.

It does not occur without box.close(). Using await for box.put() and box.delete() also prevents the error. Even if this is not a bug, the error message may be inaccurate or misleading.

Code sample
I used the sample code in the Add to project page and changed it slightly to confirm that compaction is surely triggered at the fourth execution as the condition specified as deletedEntries > 3.

import 'dart:io';
import 'package:hive/hive.dart';

void main() async {
  Hive.init(Directory.current.path);
  final box = await Hive.openBox(
    'testBox',
    compactionStrategy: (entries, deletedEntries) => deletedEntries > 3,
  );

  box.put('name', 'David');
  box.delete('name');

  print('Name: ${box.get('name')}');

  box.close();
}

Version

• Platform: Windows
• Flutter version: N/A; only Dart without Flutter
• Hive version: 1.3.0

[simc]

Thanks for reporting. This is indeed not supposed to happen.

[incker]

Have similar problem

[ch-muhammad-adil]

Still facing issue when you delete a box

[LiveRock]

Is the issue resolved?

[pedrolemoz]

Facing the same issue while testing my code. This error occurs when I run all tests instead of a single test.

When running the test individually:

When I run all tests:

[pedrolemoz]

I solved this issue by getting another instance of the current box, and then closing it before the act

[flexagoon]

I'm having the same issue

[bazzscript]

am also still having this issue

[bazzscript]

am also still having this issue

[michalsmolarek]

am also still having this issue

[anilthapa1939]

same error

[alidaoud]

any solutions ? I am having the same issue 😑

[Tom3652]

Same for me using the latest version : hive: ^2.0.5

[fuadreza]

Mine happen because I use the same box again.
First I run get then if empty result I run put.

Here's my code.

put({
    required String boxName,
    required String key,
    required String value,
  }) async {
    try {
      final Box box = await Hive.openBox(boxName);
      await box.put(key, value);
      if(box.isOpen) {
        box.close();
      }
    } catch (error) {
      throw HiveError('Hive error: ${error.toString()}');
    }
  }

  Future<String> get({
    required String boxName,
    required String key,
  }) async {
    try {
      final Box box = await Hive.openBox(boxName);
      String? result = await box.get(key);
      if(box.isOpen) {
        box.close();
      }
      if(result != null) {
        return result;
      } else {
        throw HiveError('Result Empty');
      }
    } catch (error) {
      throw HiveError('Hive error: ${error.toString()}');
    }
  }

I'm using hive: ^2.0.6

[fuadreza]

My temporary solution is to open the box again when it is not opened yet.

  put({
    required String boxName,
    required String key,
    required String value,
  }) async {
    try {
      Box box = await Hive.openBox(boxName);
      if(!box.isOpen) {
        box = await Hive.openBox(boxName);
      }
      if(box.isOpen) {
        await box.put(key, value);
        box.close();
      }
    } catch (error) {
      throw HiveError('Hive error: ${error.toString()}');
    }
  }

I don't really understand what makes that behavior occur. I thought that this behavior is same as BLoC cubit when we emit 2 state after each other that the second state is not emitted.

[fuadreza]

I also have another workaround, so basically I just add await to box.close();. Because box.close() is running asynchronously that there is a chance that you may be open the box when box is about to close. So when the box is opened, then the box closed after a while. Correct me if I'm wrong.

[dealluer]

Similar issue here. It seems that deleteFromDisk() does not wait for the actual deletion of the box?

[afzl-wtu]

Similar Issue on Windows app with latest FlutterHive version: hive_flutter: ^1.1.0